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Optimizing Java Applications on ARM Processors

TooptimizeJavaapplicationsonARM,selectatunedJVMlikeAzulZuluorAmazonCorretto,useJDK17orlater,andtestARM-specificbuilds.Next,tunegarbagecollectionbyswitchingtoZGCorShenandoah,monitorGClogs,andoptimizeheapsize.Then,explorenativecompilationviaGraalVMNati

Jul 25, 2025 am 01:17 AM

java arm processor

Java Security Best Practices for Microservices API Gateway

To ensure the security of the API gateway implemented by Java, we need to start from four aspects: authentication, authorization, current limit, logging, and secure communication. 1. Use OAuth2 or JWT to achieve stateless authentication, combine SpringSecurity verification tokens, and control role permissions through path matching; 2. Use Redis Lua script to achieve distributed current limit, configure different levels of policies, and combine the circuit breaker mechanism to prevent system crashes; 3. Record information such as request source IP, user identity, etc., generate traceId tracking links through MDC to avoid recording sensitive data; 4. Enable HTTPS encrypted communication, use TLS1.2 or above, both internal and external networks use bidirectional TLS, and regularly update certificates to ensure security.

Jul 25, 2025 am 01:15 AM

Using Testcontainers for Reliable Integration Testing in Java

Using Testcontainers can solve the reliability problem of relying on external services in Java integration testing. 1. Add Testcontainers dependencies in Maven or Gradle, such as PostgreSQL and JUnitJupiter modules; 2. Write real integration tests, start PostgreSQL container through @Container, and inject database connection information in combination with @DynamicPropertySource to ensure that the test is consistent with the production environment; 3. Optionally set postgres.setReuse(true) multiplex containers to speed up local testing, but prohibit use in CI/CD to prevent state residues from causing tests

Jul 25, 2025 am 12:54 AM

Advanced Git Workflows for Java Development Teams

UseaGitFlow Trunk-BasedHybridwithshort-livedfeaturebranchesoffmain,createreleasebranchesonlyforstabilization,andhandlehotfixesviahotfix/*mergedtobothmainandthecurrentreleasebranch;2.ImplementPRtemplatesandautomatedCIchecksforMaven/Gradlebuilds,Checks

Jul 25, 2025 am 12:54 AM

java git

Design Patterns in Java for Enterprise Applications

The most commonly used design patterns in enterprise-level Java applications include: 1. Creation mode: Singleton mode is used to ensure globally unique instances, such as log manager; factory method mode is used to decouple object creation, such as database connection creation; abstract factory mode is used to create object families, such as cross-platform UI components. 2. Structural mode: The proxy mode is used to control object access, such as remote calls and delayed loading; the adapter mode is used for interface conversion, such as integrated WeChat payment; the decorator mode is used for dynamic expansion functions, such as packaging of Java I/O streams. 3. Behavioral mode: Observer mode is used for status notification, such as event monitoring system; policy mode is used to encapsulate variable algorithms, such as different discount strategies; template method mode is used to define algorithm skeletons, such as order processing flow.

Jul 25, 2025 am 12:26 AM

Java Integration with Apache Kafka for Event-Driven Architectures

JavaintegrationwithApacheKafkaisessentialforbuildingscalable,real-timeevent-drivenarchitectures.1.JavaworkswellwithKafkaduetonativeclientsupport,strongtyping,andseamlessintegrationwithenterpriseframeworkslikeSpringBoot.2.Toproducemessages,configureaK

Jul 25, 2025 am 12:16 AM

Developing Java applications on Visual Studio Code

First install the JDK and configure the environment, then install JavaExtensionPack in VSCode, then create a project and develop efficiently with built-in features. The specific steps are: 1. Install JDK8 or higher and pass java-version verification; 2. Download and install VSCode; 3. Install JavaExtensionPack provided by Microsoft; 4. Create a simple project or use Maven to generate a project structure; 5. Use IntelliSense, debugging, reconstruction and JUnit integration to improve efficiency; 6. Configure JDK paths and project import settings in settings.json; 7. Optional installation of SpringB

Jul 25, 2025 am 12:15 AM

Java Application Performance Monitoring (APM) Tools

Common JavaAPM tools include NewRelic, DatadogAPM, AppDynamics, SkyWalking, Pinpoint and Prometheus Grafana Micrometer combinations; whether APM is required depends on system lag, complex microservice calls, performance details and optimization requirements; APM should consider deployment methods, learning costs, performance impact, cost and integration capabilities; when using them, you should pay attention to reasonable configuration, sampling rate, alarm rules, and analyze the root cause in combination with code.

Jul 24, 2025 am 03:37 AM

Building Reactive Java Applications with RxJava

1.RxJava is a responsive framework based on observer pattern and functional programming, suitable for handling asynchronous and non-blocking tasks. 2. Core types include Observable, Flowable, Single, etc., which are used to represent different forms of data flow. 3. Data conversion and combination are performed through operators such as map, filter, and flatMap to simplify complex logic. 4. Use Schedulers.io(), Schedulers.computation(), AndroidSchedulers.mainThread() and other schedulers to control thread switching. 5. Specify the data flow start thread through subscribeOn, obse

Jul 24, 2025 am 03:35 AM

Reactive programming rxjava

Implementing a Thread-Safe Singleton in Java

When using double check lock to implement lazy loading singletons, the volatile keyword is required to ensure thread visibility and prevent instruction re-arrangement; 2. It is recommended to use static internal classes (BillPugh scheme) to implement thread-safe lazy loading singletons, because the JVM ensures thread safety and no synchronization overhead; 3. If you do not need lazy loading, you can use static constants to implement simple and efficient singletons; 4. When serialization is involved, enumeration method should be used, because it can naturally prevent multiple instance problems caused by reflection and serialization; in summary, general scenarios prefer static internal classes, and serialized scenarios to select enumerations. Both have the advantages of thread safety, high performance and concise code.

Jul 24, 2025 am 03:35 AM

Comparing Java, Kotlin, and Scala for Backend Development

Kotlinoffersthebestbalanceofbrevityandreadability,Javaisverbosebutpredictable,andScalaisexpressivebutcomplex.2.Scalaexcelsinfunctionalprogrammingwithfullsupportforimmutabilityandadvancedconstructs,KotlinprovidespracticalfunctionalfeatureswithinanOOPf

Jul 24, 2025 am 03:33 AM

java Backend Development

Managing Dependencies in a Large-Scale Java Project

UseMavenorGradleconsistentlywithcentralizedversionmanagementandBOMsforcompatibility.2.Inspectandexcludetransitivedependenciestopreventconflictsandvulnerabilities.3.EnforceversionconsistencyusingtoolslikeMavenEnforcerPluginandautomateupdateswithDepend

Jul 24, 2025 am 03:27 AM

java Dependency management

Mastering Java 8 Streams and Lambdas

The two core features of Java8 are Lambda expressions and StreamsAPI, which make the code more concise and support functional programming. 1. Lambda expressions are used to simplify the implementation of functional interfaces. The syntax is (parameters)->expression or (parameters)->{statements;}, for example (a,b)->a.getAge()-b.getAge() instead of anonymous internal classes; references such as System.out::println can further simplify the code. 2.StreamsAPI provides a declarative data processing pipeline, the basic process is: create Strea

Jul 24, 2025 am 03:26 AM

Java Security Tokenization and Encryption

SecurityToken is used in Java applications for authentication and authorization, encapsulating user information through Tokenization to achieve stateless authentication. 1. Use the jjwt library to generate JWT, select the HS256 or RS256 signature algorithm and set the expiration time; 2. Token is used for authentication, Encryption is used for data protection, sensitive data should be encrypted using AES or RSA, and passwords should be stored with hash salt; 3. Security precautions include avoiding none signatures, setting the expiration time of tokens, using HTTPS and HttpOnlyCookies to store tokens; 4. In actual development, it is recommended to combine SpringSecurity and

Jul 24, 2025 am 03:24 AM